CN215565825U - Sealing and blowout preventing device for hole pipe in subway drilling construction - Google Patents

Abstract

The utility model provides a sealing and blowout preventing device for a hole pipe in subway drilling construction, which comprises an expansion screw arranged on a well wall stratum, a hole pipe and a first sealing assembly, wherein one end of the hole pipe can be hammered into the well wall stratum and can be connected with the expansion screw; the orifice pipe comprises an embedded section which can be hammered into the well wall stratum and an exposed section which is externally leaked outside the well wall stratum and is connected with the embedded section into a whole; the surface of the outer wall of the embedding block is provided with a fish scale buckle; a second sealing assembly is arranged at the communication position of the embedded block and the exposed section; the integral structure of the utility model is reasonable in design, and the second sealing component can effectively fill the gap between the insert block and the drill hole, so that the phenomenon of water and sand gushing is effectively avoided; in addition, the fish scale buckles arranged at the embedding sections can enable the orifice pipe to be connected with the drilled hole more firmly.

Description

Sealing and blowout preventing device for hole pipe in subway drilling construction

Technical Field

The utility model relates to the technical field of auxiliary equipment for drilling construction, in particular to a hole pipe sealing and blowout preventing device for subway drilling construction.

Background

In the construction of subway, inevitably will accompany the drilling construction.

And the risk that gushes water and gushes sand exists when trompil and drilling in the actual drilling work progress, if gush water and gush sand the volume too big, cause a large amount of soil erosion and water loss, probably lead to existing subway station to take place to subside.

In order to reduce the risk of water and soil loss and settlement caused by water and sand gushing, protective measures are required to be implemented during actual drilling construction. The prior art often employs the installation of conventional blowout preventers to avoid the risk of settling.

In the prior art, the traditional blowout preventer is often in loose contact with a well wall (or a station enclosure structure) in actual connection to cause a water leakage problem, and further grouting plugging treatment is needed; the processing procedure is complicated; and the slurry is easy to break when grouting plugging is actually carried out.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing problems, the utility model provides a sealing and blowout preventing device for a orifice pipe in the subway drilling construction; the utility model can be contacted with the well wall more firmly, and the water leakage problem is effectively avoided.

The technical scheme of the utility model is as follows: a sealing and blowout preventing device for a orifice pipe in subway drilling construction comprises an expansion screw arranged on a well wall stratum, the orifice pipe and a first sealing assembly, wherein one end of the orifice pipe can be hammered into the well wall stratum and can be connected with the expansion screw, and the first sealing assembly can be movably connected with the other end of the orifice pipe; the orifice pipe comprises an embedded section which can be hammered into the well wall stratum and an exposed section which is externally leaked outside the well wall stratum and is connected with the embedded section into a whole;

the surface of the outer wall of the embedding block is provided with a fish scale buckle;

the exposed section is provided with a bypass gate valve;

a second sealing assembly is arranged at the communication position of the embedded block and the exposed section; the second sealing assembly comprises a connecting disc arranged on the exposed section, an expansion ferrule arranged on the connecting disc and positioned on the outer wall of the embedding section, and an insertion assembly which can be movably arranged on the connecting disc and can be inserted into the expansion ferrule;

the connecting disc is provided with a first through hole capable of being connected with the expansion screw and a second through hole through which the insertion assembly can pass; the first through holes and the expansion screws are multiple, and the first through holes are circumferentially arranged on the connecting disc;

the insertion assembly comprises a fixing ring and a core screw, one end of the core screw is arranged on the fixing ring, and the other end of the core screw can be inserted into the expansion ferrule through the second through hole; the core screw has a plurality ofly, and a plurality of core screw circumference sets up on solid fixed ring.

Furthermore, a sealing object is wound on the fish scale buckle; the gap between the embedding block of the orifice pipe and the borehole wall can be effectively filled by utilizing the sealing material, and the water leakage problem can be effectively avoided.

Furthermore, the sealant is made of hemp threads or cotton threads; hemp or cotton is the preferred material for the sealant because of its low cost and ready availability.

Further, the first sealing assembly comprises a ball valve and a sealing element, wherein one end of the ball valve is movably arranged at the other end of the orifice pipe, and the sealing element can be movably arranged at the other end of the ball valve; utilize the ball valve can utilize diamond bit to carry out the secondary trompil after the orifice pipe reachs the design degree of depth, open through the structure after, withdraw from tapping machine, in time close the ball valve.

Furthermore, the sealing element comprises a sleeve with one end movably arranged at the other end of the ball valve and a blocking block sleeved at the other end of the sleeve; the blocking block can be used for effectively avoiding the condition of gushing water and sand in large quantity when secondary drilling is carried out.

Furthermore, the plugging block is made of wood or polyurethane; the other end of the sleeve can be effectively blocked by the wood plug or the polyurethane plug and then secondary drilling is carried out.

Furthermore, the connecting disc and the expansion ferrule are integrated, the connecting disc is welded on the exposed section, and the expansion ferrule is welded on the insert block; the connection disc and the expansion ferrule adopt an integral structure, so that structural firmness can be effectively guaranteed, and the sealing performance is better.

Compared with the prior art, the utility model has the beneficial effects that:

1. the integral structure of the utility model is reasonable in design, and the second sealing component can effectively fill the gap between the insert block and the drill hole, so that the phenomenon of water and sand gushing is effectively avoided; in addition, the fish scale buckles arranged on the embedding sections can enable the orifice pipe to be connected with the drill hole more firmly;

2. the utility model has simple integral structure and low manufacturing cost, is convenient and fast in integral construction process in actual use, and is suitable for mass popularization.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

fig. 2 is an exploded view of a first filter blocking assembly according to embodiment 1 of the present invention;

the device comprises a hole pipe 1, an insert block 11, a fish scale buckle 110, an exposed section 12, a bypass gate valve 120, a first sealing assembly 2, a ball valve 21, a sealing member 22, a sleeve 221, a plugging block 222, a second sealing assembly 3, a connecting disc 31, a first through hole 310, an expansion ferrule 32, an insertion assembly 33, a fixing ring 331 and a core screw 33.

Detailed Description

Example 1: the sealing and blowout preventing device for the orifice pipe in the subway drilling construction comprises an expansion screw arranged on a well wall stratum, the orifice pipe 1 and a first sealing assembly 2, wherein one end of the orifice pipe 1 can be hammered into the well wall stratum and can be connected with the expansion screw, and the other end of the orifice pipe 1 can be movably connected with the first sealing assembly; the orifice pipe 1 comprises an embedded section 11 which can be hammered into a well wall stratum and an exposed section 12 which leaks outside the well wall stratum and is connected with the embedded section 11 into a whole;

the outer wall surface of the inlay block 11 is provided with a fish scale buckle 110; wherein, the fish scale buckle 110 is wound with a sealing object; the sealant is hemp silk;

the exposed section 12 is provided with a bypass gate valve 120;

a second sealing component 3 is arranged at the communication position of the embedded block 11 and the exposed section 12; as shown in fig. 2, the second sealing assembly 3 comprises a connecting disc 31 arranged on the exposed section 12, an expansion ferrule 32 arranged on the connecting disc 31 and positioned on the outer wall of the insert block 11, and an insertion assembly 33 movably arranged on the connecting disc 31 and capable of being inserted into the expansion ferrule 32;

the connecting disc 31 is provided with a first through hole 310 capable of being connected with an expansion screw, and a second through hole through which the insert assembly 33 can pass; the number of the first through holes 310 and the number of the expansion screws are multiple, and the first through holes 310 are circumferentially arranged on the connecting disc 31;

the insertion assembly 33 includes a fixing ring 331, and a core screw 332 having one end provided on the fixing ring 331 and the other end insertable into the expansion collar 32 through the second through hole; the core screw 332 is plural, and the plural core screws 332 are circumferentially provided on the fixing ring 331;

as shown in fig. 1, the first sealing assembly 2 comprises a ball valve 21 movably disposed at one end of the orifice pipe 1 and a sealing member 22 movably disposed at the other end of the ball valve 21; the sealing element 22 comprises a sleeve 221 with one end movably arranged at the other end of the ball valve 21 and a blocking block 222 sleeved at the other end of the sleeve 221; the plugging block 222 is made of wood.

Example 2: the difference from example 1 is: the sealant is made of cotton silk.

Example 3: the difference from example 1 is: the plugging block 222 is made of polyurethane.

Example 4: the difference from example 1 is: the connecting disc 31 and the expansion ferrule 32 are integrated, the connecting disc 31 is welded on the exposed section 12, and the expansion ferrule 32 is welded on the insert block 11.

Claims (7)

1. A sealing and blowout preventing device for a orifice pipe in subway drilling construction comprises an expansion screw arranged on a well wall stratum, an orifice pipe (1) and a first sealing assembly (2), wherein one end of the orifice pipe (1) can be hammered into the well wall stratum and can be connected with the expansion screw, and the other end of the orifice pipe (1) can be movably connected with the first sealing assembly; the anti-cracking well mouth pipe is characterized in that the mouth pipe (1) comprises an embedded section (11) capable of being hammered into a well wall stratum and an exposed section (12) which is leaked outside the well wall stratum and is connected with the embedded section (11) into a whole;

the surface of the outer wall of the embedding block (11) is provided with a fish scale buckle (110);

the exposed section (12) is provided with a bypass gate valve (120);

a second sealing component (3) is arranged at the communication position of the embedded block (11) and the exposed section (12); the second sealing assembly (3) comprises a connecting disc (31) arranged on the exposed section (12), an expansion ferrule (32) which is arranged on the connecting disc (31) and is positioned on the outer wall of the embedding block (11), and an insertion assembly (33) which can be movably arranged on the connecting disc (31) and can be inserted into the expansion ferrule (32);

the connecting disc (31) is provided with a first through hole (310) capable of being connected with an expansion screw and a second through hole capable of allowing an insertion assembly (33) to pass through; the number of the first through holes (310) and the number of the expansion screws are multiple, and the first through holes (310) are circumferentially arranged on the connecting disc (31);

the insertion assembly (33) comprises a fixed ring (331), and a core screw (332) having one end disposed on the fixed ring (331) and the other end insertable into the expansion collar (32) through the second through hole; the core screws (332) are multiple, and the multiple core screws (332) are circumferentially arranged on the fixing ring (331).

2. The orifice pipe sealing and blowout preventing device in subway drilling construction as claimed in claim 1, wherein said fish scale buckle (110) is wound with a sealer.

3. The device for sealing and preventing the blowout of the orifice pipe in the subway drilling construction as claimed in claim 2, wherein the sealing material is hemp thread or cotton thread.

4. A bore tube sealing and blowout preventer according to claim 1, in subway drilling construction, the first seal assembly (2) comprises a ball valve (21) movably arranged at one end of the bore tube (1) and a seal (22) movably arranged at the other end of the ball valve (21).

5. The orifice pipe sealing and blowout preventer as claimed in claim 1, wherein the sealing member (22) comprises a casing (221) movably disposed at one end of the ball valve (21) and a plugging block (222) fitted at the other end of the casing (221).

6. The orifice pipe sealing and blowout preventer as claimed in claim 5, wherein the plugging block (222) is made of wood or polyurethane.

7. The orifice pipe sealing and blowout preventing device in subway drilling construction as claimed in claim 1, wherein said connecting disc (31) is integrated with expansion ferrule (32), and the connecting disc (31) is welded on the exposed section (12), and the expansion ferrule (32) is welded on the insert block (11).

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